11-17-2018, 10:56 AM | #1 |
BL1ZZRD
Drives: '16 Camaro 2SS, '20 Equinox Redline Join Date: Jul 2009
Location: Buffalo, NY
Posts: 7,840
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ZL1 Addons rear Diffuser review
I installed the ZL1 Addons diffuser today so I thought I’d write up a quick review. The package came FedEx in a taped up triangular cardboard package. Parts were perfect condition and as advertised. Very good quality piece and fairly heavy duty, more so than I expected. It came with 2 black screws, flat washers, and nuts, no instructions.
Install was advertised as very easy and quick. The problem I ran into though was there are 4 holes in the diffuser but only 2 screws holding the OEM valence, so it was obvious that the outer 2 holes would have to be drilled (1/4” drill bit) and use the supplied screws and nuts. The center 2 holes lined up with the factory screws so reuse of the screws would be required. However, upon installing the diffuser it became clear that the OEM screws were just too short to get them started so I had to resort to my stash of longer screws in my truck. Once the center screws are in and holding the diffuser up the outer holes can be drilled. There is no mention of this on their website and no instructions came with the diffuser so be aware that drilling is necessary! Once the outer holes are drilled the black screws and nuts can be installed. I added a stainless lock washer and changed the flats to stainless. Overall impression is positive and the install was fairly easy once I figured out the longer center screws. Having someone to help hold it up would be good but I did it alone with my knee holding one end up as I screwed in the other end. |
11-17-2018, 08:17 PM | #2 |
Drives: 2017 Camaro SS Join Date: Nov 2018
Location: East Tennessee
Posts: 522
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Pardon my ignorance, but what does the diffuser do?
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Kevin
Luceo Non Uro |
11-17-2018, 08:44 PM | #3 |
War Horse Pilot
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Helps cut the air moving under the car to improve handling at speed. Plus they look cool. LOL
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11-17-2018, 09:34 PM | #4 |
Drives: 17 1SS Join Date: Mar 2017
Location: Orange County CA
Posts: 41
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11-18-2018, 02:43 AM | #5 |
Drives: 2016 Camaro SS Join Date: Mar 2017
Location: Dubai
Posts: 43
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Fugly.......
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11-18-2018, 10:02 AM | #6 |
2018 ZL1 1LE
Drives: 2018 ZL1 1LE Join Date: Aug 2017
Location: Westfield, IN
Posts: 1,010
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Yeah, kinda looks like, well...an add on! Like the concept though. Looks like it hangs a little low, curbs and speedbumps could be an issue.
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11-18-2018, 11:50 AM | #7 |
Drives: 18 ZL1 nightfall grey A10 Join Date: Apr 2018
Location: RGV Texas
Posts: 1,527
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For it to work it should have been built into a bumper and not something that just, well, adds on. I’m not digging it
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11-18-2018, 08:18 PM | #8 |
Drives: 2017 Camaro 2SS Nightfall Gray vert Join Date: Jan 2018
Location: Swansea, IL
Posts: 1,219
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I prefer the replacement diffusers instead of simply adding on. The only problem is the replacement diffusers only support the quad tip exhaust...
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2017 Camaro 2SS vert - Nightfall Gray
Magnuson Heartbeat SC - Tuned by JRE Racing 776whp/745wtq (12psi) 2018 Corvette Z06 vert- Black To be tuned by JRE Racing TBD performance |
11-18-2018, 08:57 PM | #9 | |
Big Samoan ina little car
Drives: 2016 camaro Join Date: May 2014
Location: Tofiga Island
Posts: 1,872
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Quote:
A legit diffuser usually mounts completely under the car and is flat, with a rake of 10-15 degrees at the tail end. https://www.google.com/search?q=diff...I3aNX88ELuBOzM Same with "splitters"... most people refer to front lips or air dams as a splitter. APR makes a legit splitter. gm, and most other companies make front lips and air dams. Theyre a dime a dozen.
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Don't sit around and watch everyone else live YOUR dreams...DO SUMPT'N
When I see posts asking "whats the best intake, exhaust, etc" .... the answer to that is like a grandfather telling his grandkids "if you put salt on a birds tail, it'll let you catch it" #ThinkAboutIt "Winning Tip: Don't take my (or anyone else's) word for it. GO TEST IT!" - Dennis Grant |
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11-19-2018, 11:15 AM | #10 |
Drives: 2016 1ss camaro Join Date: Feb 2016
Location: 909
Posts: 9,813
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yea not a fan sorry
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16 1SS NIGHTFALL GRAY METALLIC WITH NPP #BECAUSERACECAR #SAVETHEMANUALS
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11-19-2018, 12:40 PM | #11 |
BL1ZZRD
Drives: '16 Camaro 2SS, '20 Equinox Redline Join Date: Jul 2009
Location: Buffalo, NY
Posts: 7,840
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11-19-2018, 01:15 PM | #12 |
Drives: 2017 1ss Join Date: Mar 2016
Location: Ny
Posts: 16
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Have it on my silver 2017. I get nothing but compliments on it.
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11-19-2018, 01:17 PM | #13 |
Drives: 2016 1ss camaro Join Date: Feb 2016
Location: 909
Posts: 9,813
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ive been looking at the acs one lately tbh
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16 1SS NIGHTFALL GRAY METALLIC WITH NPP #BECAUSERACECAR #SAVETHEMANUALS
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11-19-2018, 03:12 PM | #14 |
Drives: 2017 Camaro 2SS Nightfall Gray 1LE Join Date: Mar 2017
Location: SoCal
Posts: 86
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The ZL1 Addons diffuser is one of the few that is designed correctly. It has 5 to 12 deg angle and strikes and mounts under the car.
If you look at diffusers on race cars they are not pretty, but they work. It creates a low pressure area under the car which generates down force. |
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